Kinopio - Thinking canvas for mind mapping, brainstorming, and moodboards
Stickies - Stickies is a PC utility written to replace Post-It-style notes left stuck to your monitor.
Kanboard - Kanboard is a free and open source Kanban project management software.
7 Sticky Notes - Welcome to the 7 Sticky Notes Website! 7 Sticky Notes is a cool 100% free desktop notes software that creates Sticky Notes directly at the Desktop of your computer to help you organizing your everyday tasks and to-do lists.
Excalidraw - Excalidraw is a whiteboard tool that lets you easily sketch diagrams that have a hand-drawn feel to them.
Microsoft Sticky Notes - A brand new Sticky Notes for Windows has arrived!